steam engine valves long before even1830. In the French patents are many drawings ofvery early engines, in which the valves were movedby cams, and which had a lap at each end equal tothe width of the steam ports. It is true that thecams were made to move the valves quickly, buteven then some time… … I SMITHS WATER PRESSURE WHEEL. ferring to the following description:—The shaft, A,has four arms, B, which are forked at the ends andcarry idler pulleys, 0. These pulleys bear on a rub-ber diaphragm, E, which is attached to the case, F.There is also a scroll or case, G, having four or moreinlet…
Patents · Claim · Combination · Manner · Constructed · Purpose · Scientific American · Patent law · Steam engine · York city · Sealed proposals · Purpose set · Patent office · Slide valve · Purposes set · Presser plate
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